Marsh Horsetail
Equisetum palustre
Synonym: Equisetum paluste var. americanum
Masses of marsh horsetail as seen along the muddy, lower Columbia River shoreline several hundred meters west of the Dalton Point boat launch.........October 8, 2012.
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Close-ups of the branched stems of marsh horsetail as seen along the Columbia River shoreline several hundred meters west of the Dalton Point boat launch........October 8, 2012.
Marsh horsetail as seen in moist soils at the east end of Grand Meadows on the western slopes of Mt. Adams........September 28, 2008. Note the thin whitish membranes at the edges of the teeth.
The photo above shows marsh horsetail as seen in moist soils at the east end of Grand Meadows on the western slopes of Mt. Adams.........September 28, 2008.
Paul Slichter